I am currently reading The Diary of a Wimpy Kid for the class Lit Circle assignment. I'm the classroom aide and I had to be in a group (better this book than a Captain Underpants book! ) .
I am, also, reading the The Lightning Theif by Rick Riordan... actually, rereading it. It's a good series.

Like many others I usually have several things going on simultaneously:

City of Illusions, from a book collecting some of the Hainish Cycle novels by Ursula Le GuinClarissa, or The History of a Young Lady by Samuel Richardson. It's so long and so good
A book on Gothic art and architecture, the medieval kind, not Victorian Gothic. Dense text but great pictures
A book of Samuel Taylor Coleridge poems